1# $NetBSD: varname-dot-make-level.mk,v 1.5 2024/11/23 22:59:51 rillig Exp $ 2# 3# Tests for the special .MAKE.LEVEL variable, which informs about the 4# recursion level. It is related to the environment variable MAKELEVEL, 5# even though they don't have the same value. 6 7all: level_1 set-env 8 9level_1: .PHONY 10 @printf 'level 1: variable %s, env %s\n' ${.MAKE.LEVEL} "$$${.MAKE.LEVEL.ENV}" 11 @${MAKE} -f ${MAKEFILE} level_2 12 13level_2: .PHONY 14 @printf 'level 2: variable %s, env %s\n' ${.MAKE.LEVEL} "$$${.MAKE.LEVEL.ENV}" 15 @${MAKE} -f ${MAKEFILE} level_3 16 17level_3: .PHONY 18 @printf 'level 3: variable %s, env %s\n' ${.MAKE.LEVEL} "$$${.MAKE.LEVEL.ENV}" 19 20# The .unexport-env directive clears the environment, except for the 21# MAKE_LEVEL variable. 22.if make(level_2) 23.unexport-env 24.endif 25 26 27# expect: make: Cannot override read-only global variable ".MAKE.LEVEL.ENV" with a command line variable 28set-env: 29 @${MAKE} -f /dev/null .MAKE.LEVEL.ENV=MAKELEVEL 30